Magnetic Field Dependence of the Density of States of YBa2Cu3O6.95 as Determined from the Specific Heat

K. A. Moler, D. J. Baar, J. S. Urbach, Ruixing Liang, W. N. Hardy, and A. Kapitulnik
Phys. Rev. Lett. 73, 2744 – Published 14 November 1994
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Abstract

The magnetic field dependence of the electronic density of states at the Fermi level, N(EF,H), is determined in single-crystal YBa2Cu3O6.95 by specific heat measurements. The total specific heat is best described by including two predictions for the electronic specific heat of d-wave superconductivity: a T2 term in zero field and an increased linear term in a magnetic field applied perpendicular to the CuO2 planes. The additional linear term, which implies a finite N(EF,H), obeys N(EF,H)(HHc2)12 as predicted by Volovik for superconductivity with lines of nodes in the gap.

  • Received 14 June 1994

DOI:https://doi.org/10.1103/PhysRevLett.73.2744

©1994 American Physical Society

Authors & Affiliations

K. A. Moler1, D. J. Baar2, J. S. Urbach3, Ruixing Liang2, W. N. Hardy2, and A. Kapitulnik1

  • 1Departments of Physics and Applied Physics, Stanford University, Stanford, California 94305
  • 2Department of Physics, University of British Columbia, Vancouver, Canada V6T1Z1
  • 3Center for Nonlinear Dynamics, University of Texas, Austin, Texas 78712

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Vol. 73, Iss. 20 — 14 November 1994

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